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Developer Experience Is the New Performance
We've optimized runtime performance for years—but ignored developer performance. This post reframes DX as a first-class metric: faster iteration, fewer cognitive branches, better tooling...
Idempotency Keys: How to Make Retries Safe
Networks fail, clients retry, and suddenly a customer is charged twice. Here's how idempotency keys work and how to build them into your own API, step by step.
Rate Limiting, Explained: Token Buckets, Sliding Windows and Honest 429s
Every public API needs a rate limiter, and most get it subtly wrong. Here's how the main algorithms work, which one to pick, and how to tell clients exactly when to come back.
Zero-Downtime Database Migrations: The Expand/Contract Playbook
Your deploy is zero-downtime. Your schema change probably isn't. Here's how expand/contract, lock timeouts and concurrent indexes let you change a live Postgres table safely.
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